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【简答题】
如何用化学方法鉴别苯甲醇和苯甲醛。
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【单选题】Chinese netizens (网民) are more likely to use the Internet for social contact reasons,so they use blogs and chatting rooms on a larger_____
A.
scale
B.
level
C.
interface
D.
chance
【简答题】100℃时气相反应A→Y+z为二级反应．若从纯A开始在等容下进行反应，10min后系统总压力为24.58kPa，其中A的摩尔分数为0.1085，求： (1) 10min时A的转化率； (2) 反应的速率常数。
【单选题】互联网普及率 8 月30日,中国互联网络信息中心发布《中国互联网络发展状况统计报告》。报告指出,截至2019年6月,我国网民规模达8.54亿,互联网普及率达61.2%;我国手机网民规模达8.47亿,网民使用手机上网的比例达99.1%。 The number of internet users in China had hit 854 million as of June 2019, with th...
A.
the internet popularity rate
B.
the internet availability rate
【简答题】Recently, Chinese netizens (网民) enjoy themselves on “growing and stealing crops” on the Internet. This is a called “Happy Farms”. Now more and more people are joining in the , and getting add...
【单选题】Baidu is the most popular ( ) with Chinese netizens (网民).
A.
search machine
B.
search engine
C.
research machine
D.
research engine
【简答题】Can you imagine a world without the Internet? It’s surprising to think about it. Now, China has more than 162 million Internet users, according to the China Internet Network Information Centre. This i...
【单选题】Chinese netizens （网民） doubt ______they called Western freedom of speech , seeing the dishonest reports about the recent riots（暴乱） in Tibet by some Western media．
A.
that
B.
which
C.
what
D.
Whether
【简答题】恒容反应器中气相反应动力学研究 在一恒容反应器中，丁二烯发生如下气相二聚反应： 2C 4 H 6 →(C 4 H 6 ) 2 反应温度为326℃，实验中测得系统总压力p t 与时间t的关系列于下表。试根据表中所列数据建立反应的动力学方程。在该实验条件下可假设反应为不可逆的。
【简答题】(5)若s是int型变量,且s=8,则表达式s%2+(s+1)%2的值为()。
【简答题】Can you imagine a world without the Internet? It’s surprising to think about it. Now, China has more tha n 162 million Internet users, according to the China Internet Network Information Centre. This ...
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